The answer to 'maintenance not cooling' is that there are several common causes for an air conditioning system not cooling properly, including low refrigerant levels, a dirty air filter, issues with the compressor or condenser, and problems with the thermostat. Symptoms may include warm air blowing from the vents, the system running constantly, or the unit not turning on at all.
For low-level issues, you may be able to resolve the problem with some basic DIY maintenance like changing the air filter or cleaning the condenser coils. However, more complex problems like refrigerant leaks or compressor failures will likely require a professional HVAC technician to diagnose and repair. It's important to address cooling issues promptly to prevent further damage to the system and ensure your home stays comfortable.